<template>
    <SvgIcon
        :size="size"
        :name="getSvgIcon"
        v-if="isSvgIcon"
        :class="[$attrs.class, 'anticon']"
        :spin="spin"
    />
    <span
        v-else
        ref="elRef"
        :class="[$attrs.class, 'app-iconify anticon', spin && 'app-iconify-spin']"
        :style="getWrapStyle"
    ></span>
</template>
<script>
import {
  defineComponent,
  ref,
  watch,
  onMounted,
  nextTick,
  unref,
  computed,
} from 'vue';
import SvgIcon from './SvgIcon.vue';
// import Iconify from '@purge-icons/generated';
import Iconify from "@iconify/iconify/dist/iconify";
import { isString } from '@/utils/dataType';

const SVG_END_WITH_FLAG = '|svg';
export default defineComponent({
  name: 'Icon',
  components: { SvgIcon },
  props: {
    // icon name
    icon:{
      type:String,
      default:''
    },
    // icon color
    color:{
      type:String,
      default:''
    },
    // icon size
    size: {
      type: [String, Number],
      default: 16,
    },
    spin:{
      type:Boolean,
      default:false
    },
    prefix:{
      type:String,
      default:''
    },
  },
  setup(props) {
    const elRef = ref(null);

    const isSvgIcon = computed(() => props.icon?.endsWith(SVG_END_WITH_FLAG));
    const getSvgIcon = computed(() => props.icon.replace(SVG_END_WITH_FLAG, ''));
    const getIconRef = computed(() => `${props.prefix ? props.prefix + ':' : ''}${props.icon}`);

    const update = async () => {
      if (unref(isSvgIcon)) {
        return;
      }

      const el = unref(elRef);
      if (!el) {
        return;
      }

      await nextTick();
      const icon = unref(getIconRef);
      if (!icon) {
        return;
      }

      const svg = Iconify.renderSVG(icon, {});
      if (svg) {
        el.textContent = '';
        el.appendChild(svg);
      } else {
        const span = document.createElement('span');
        span.className = 'iconify';
        span.dataset.icon = icon;
        el.textContent = '';
        el.appendChild(span);
      }
    };

    const getWrapStyle = computed(() => {
      const { size, color } = props;
      let fs = size;
      if (isString(size)) {
        fs = parseInt(size, 10);
      }

      return {
        fontSize: `${fs}px`,
        color: color,
        display: 'inline-flex',
      };
    });

    watch(() => props.icon, update, { flush: 'post' });

    onMounted(update);

    return { elRef, getWrapStyle, isSvgIcon, getSvgIcon };
  },
});
</script>
<style lang="scss" scoped>
  .app-iconify {
    display: inline-block;
    // vertical-align: middle;

    &-spin {
      svg {
        animation: loadingCircle 1s infinite linear;
      }
    }
  }

  span.iconify {
    display: block;
    min-width: 1em;
    min-height: 1em;
    background-color: #5551;
    border-radius: 100%;
  }
</style>
